Table 4 Statistical analysis for the effects of sediment type on the parameters of Thalassia hemprichii. There were two stages for photosynthetic parameters. P < 0.05 (significant); P < 0.01 (highly significant)

Day 6

Day 21

Y (II)

2

1.412

0.314

Y (II)

2

1.727

0.256

rETR_max

2

3.346

0.106

rETR_max

2

5.312

< 0.05

Ek_ETR

2

1.020

0.415

Ek_ETR

2

3.965

0.080

α_ETR

2

0.466

0.649

α_ETR

2

1.740

0.254

leaf nitrogen

2

62.547

< 0.01

δ³⁴S

2

629.078

< 0.01

ratio of amino acid to leaf nitrogen

2

6.708

< 0.05

Organic matter

2

13.158

< 0.01

Eh

2

21.653

< 0.01

S

2

59.828

< 0.01

aboveground tissue

belowground tissue

glycine

2

12.702

< 0.01

glycine

2

92.525

< 0.01

sarcosine

2

9.832

< 0.05

sarcosine

2

23.737

< 0.01

alanine

2

8.964

< 0.05

alanine

2

41.459

< 0.01

valine

2

10.335

< 0.05

valine

2

204.800

< 0.01

proline

2

2.841

0.136

proline

2

41.100

< 0.01

threonine

2

2.181

0.194

threonine

2

134.373

< 0.01

isoleucine

2

10.712

< 0.05

isoleucine

2

73.448

< 0.01

leucine

2

12.082

< 0.01

leucine

2

66.719

< 0.01

ornithine

2

0.435

0.666

ornithine

2

42.395

< 0.01

methionie

2

21.875

< 0.01

methionie

2

306.695

< 0.01

histidine

2

3.281

0.109

histidine

2

122.650

< 0.01

phenylalanine

2

6.683

< 0.05

phenylalanine

2

19.644

< 0.01

arginine

2

5.777

< 0.05

arginine

2

14.548

< 0.01

tyrosine

2

8.073

< 0.05

tyrosine

2

94.401

< 0.01

asparagic acid

2

0.737

0.517

asparagic acid

2

39.413

< 0.01

tryptophan

2

0.484

0.639

tryptophan

2

3.826

0.085

4-aminobutyric acid

2

5.708

< 0.05

4-aminobutyric acid

2

57.394

< 0.01

serine

2

4.827

0.056

serine

2

117.694

< 0.01

lysine

2

0.247

0.789

lysine

2

2.830

0.136

glutamate

2

1.419

0.313

glutamate

2

3.955

< 0.080

total amino acids

2

4.433

0.066

total amino acids

2

76.191

< 0.01

catechin

2

6.456

< 0.05

catechin

2

19.131

< 0.01

epicatechin

2

–

–

epicatechin

2

143.001

< 0.01

taxifolin

2

–

–

taxifolin

2

0.590

0.584

galuteolin

2

0.209

0.817

galuteolin

2

2.146

0.198

rutin

2

0.942

0.441

rutin

2

3.498

0.098

isoquercitrin

2

2.143

0.198

isoquercitrin

2

12.003

< 0.01

astragalin

2

–

–

astragalin

2

4.119

0.075

diosmin

2

2.616

0.152

diosmin

2

–

–

quercetin

2

9.660

< 0.05

quercetin

2

35.336

< 0.01

naringenin

2

3.003

0.125

naringenin

2

5.609

< 0.05

luteolin

2

3.882

0.083

luteolin

2

4.859

0.056

apigenin

2

1.279

0.345

apigenin

2

23.055

< 0.01

chrysin

2

8.173

< 0.05

chrysin

2

–

–

kaempferide

2

3.753

0.088

kaempferide

2

–

–

total flavonoids

2

0.883

0.461

total flavonoids

2

26.375

< 0.01